Purification and Sedimentation and Electron Micrographic Characters of the Mumps Virus.

Abstract
Mumps virus was cultivated in the chorio-allantoic fluid of the chick embryo. It was then purified by centrifugation. Sedimentation diagrams, and electron miscroscope pictures showed a wide variation in particle size. The virus was spherical, and flattened electron micrograph images had a diam. of 190[plus or minus] 42 millimicrons.

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